What is HDEP

 HEDP stands for 1-hydroxyethylidene-1,1-diphosphonic acid, also known as etidronic acid. It is an organophosphonate used widely in industrial water treatment, including cooling towers, due to its excellent scale inhibition, moderate…

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CO2 for pH Control

Using CO₂ for alkalinity control in cooling towers is effective, and in many cases, cost-competitive with acid feed (especially sulfuric). FeatureCO₂Sulfuric AcidCostHigherLowerCorrosion riskLowHigh (can cause localized corrosion)SafetySafer (non-hazardous gas)Hazardous, requires PPE…

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